What is Desiccant Masterbatch?

January 12, 2026

What is Desiccant Masterbatch?

Desiccant masterbatch is an additive. You mix it into plastic materials during processing to cut down on or fix moisture-related problems . It’s made with desiccants (drying agents) like calcium oxide or molecular sieves—these substances have a strong attraction to moisture—they can grab and soak up water molecules .

Key Features

Safe & Harmless: It’s non-toxic and pollution-free .
No Impact on Plastics: It doesn’t affect the performance of the final plastic products .
Easy & Cost-Effective: It’s a simple way to solve moisture issues without breaking the bank .

What Moisture Problems Does It Fix?

Moisture can hide in raw materials like hygroscopic polymers, fillers, and pigments. Recycled polymers also often have high moisture levels . When you process wet plastic:

The plastic gets porous, with gaps showing up in molded parts or extruded sheets .
For film production, moisture causes problems like lensing (window-like defects) and burst film bubbles .

How It Works & Its Benefits

During processing, the masterbatch chemically locks onto moisture . Here’s what that means for you:

Use more recycled polymer and higher amounts of fillers .
Skip pre-drying steps in many cases (saves time and equipment use) .
It soaks up moisture from plastic raw materials and other additives during molding .

In the end, it boosts product quality and yield, makes production faster, and cuts down on energy use .